Comparative Analysis of Sugar Components and Contents of Eight Grape Cultivars in Xinjiang

【Objective】 To compare and analyze the characteristics of sugar components and contents in the mature period of 8 grape cultivars in Xinjiang in the hope of laying a theoretical foundation for the selection of high-sugar grape varieties and the control of fruit quality in the future. 【Method】 Red Globe Grape, Victoria,Muscat Hamburg, XinYu, Flame Seedless, Summer Black, Crimson Seedlessand Munage were taken as the research objects, the soluble solid contents were determined by sampling at the ripening stage, and the sugar components and contents were measured by high performance liquid chromatography (HPLC); The proportion of each component to the total soluble sugar was analyzed and the sugar components and content characteristics of each variety were compared. 【Result】 The results showed that glucose and fructose accumulation were the main sugar components in the eight varieties at fruit ripening stage, supplemented by sucrose. Among them, fructose accounted for 52.51% of total sugar, glucose accounted for 49.58% of total sugar, and sucrose accounted for only 3.14% of total sugar. There were significant or extremely significant differences in glucose and fructose contents in eight grape fruits, among which Flame Seedless content was the highest, significantly or extremely significantly higher than other varieties, and Victoria was the lowest. The content of soluble solids in Flame Seedless was 61.8% higher than that in Victoria, and the content of fructose was 55.42% higher than that in Victoria. By cluster analysis, the relationship between Flame Seedless and the sugar components of Crimson Seedless, Summer Black was close, and that between Victoria and other varieties was relatively far. 【Conclusion】 Through the comparative analysis of 8 grape varieties, the high-sugar variety Seedless Flame Seedless was selected as the high-fructose variety, and the low-sugar variety Victoria was selected as the low-fructose type.